Malicious PDF — malware analysis report

Static analysis result for SHA-256 8086356e9357ada3…

MALICIOUS

PDF

82.9 KB Created: 2021-08-18 13:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cee5baf3ad3ed8e660f58eb72d81dcef SHA-1: 6e372a5fde16b54d1a1f53b095914a69e69910dc SHA-256: 8086356e9357ada3b51255d5c0f6194f638211e3ef98fe67da95ca2ddaf93c86
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', further supporting its malicious nature. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, suggests potential for further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6964

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ludifrance.fr/userfiles/file/sivovuxijazujog.pdf In PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/2957824172.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/48841087248.pdfIn PDF document text
    • https://agatanorek.com/files/file/62256387200.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/96859483190.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608975b6c6dcf---32668918906.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff00f66ff6---8369573539.pdfIn PDF document text
    • http://emurus.jp/userfiles/file/ribaran.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b2729593a42f003db3073f7d4a7cd046/fozajajisotokajirugo.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/wufumosubokuzojoluzoj.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/23296041738.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160914be9bdaaa---71123435225.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb5951e9af---magijibakedanisodaxebari.pdfIn PDF document text
    • https://led7.ru/file/rogonimefawelobikerixi.pdfIn PDF document text
    • https://5a.ro/ckfinder/userfiles/files/83569615142.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/d189544d9e59f056dd98e119a5b2d710/vuluku.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/9d9d52a11a9a74b53a36a6843a42ae0b/30807561263.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160acc770bf865---23860702667.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/xipodi.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/10e686bd19a194c88d87480006798463/50475011037.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079e59119187---bavoxatititogopuvunejad.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/c144b1cc2d2498e6042d56879973bea0/mejijuxoxuremagetuzavub.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a995c31e257---30225611431.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210613230504.pdfIn PDF document text
    • http://onsijsselstein.nl/userfiles/files/95273832603.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+far+can+you+kill+a+deer+with+a+6.5+creedmoorPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001072f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072F 17388 bytes
SHA-256: b6fb8dd1704df0e71703c6e74b478222884e9641156425adae7fa38296f1c012
font_02_sfnt_off0001350a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350A 11324 bytes
SHA-256: 45afa01564a26ad1cb2aeaa3297987f33059d0b5d6992acbaabe37327b012073